To understand America, one needs to go no further than the closest national park. National parks commemorate the people, places, and events that have shaped the American experience. These national treasures serve as tangible reminders of what it means to be made in America.

The Travel Channel has crisscrossed the globe to uncover the earth’s most amazing, refreshing and off-the-beaten-path places to dive into in the new season of “Top Secret Swimming Holes,” premiering Sunday, July 23 at 9:00 p.m. and 10:00 p.m. ET/PT.

Among the state of Colorado’s 29 rafting sections, the Arkansas River offers the longest stretch of whitewater, the longest boating season into September, and hosts more than 40 percent of the state’s visitors who go rafting, making it the country’s most popular whitewater rafting destination.